Perforating-machine.



No. 70H07. vPatented May 27, |902.

W. H. TREEN.

PERFORATING MACHINE.

(Application led Oct 14, 1901 3 shanty-Sheet I.

(No Model.)

Patented May 27, |902. W. H. TREEN. Y

PERFORATING MACHINE.

(Application' led Oct, 14, 1901.)

(No Mode.)

lull" H No. 70|,l07. Patented May 27, |902.

Y W. H. TREEN.

PERFORTING MACHINE.

(Applictian med ocr. 14, 1901.) (No Model.) a sheets-sheet a.

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VILLIAM Il. TREEN, OF LYNN, MASSACHUSETTS.

PERFORATlNG-NIACHINE.

SPECIFIGATON forming part of Letters Patent No. 701,107, dated May 27, 190,2.

Application filed October 14, 1901. Serial No. 78,533. (No model.)

To @ZZ whom, it may concern:

Be it known that I, WILLIAM H. TREEN, of Lynn, in the county of Essex and State of Massachusetts, have in ventedcertain new and useful Improvements in Perforating-h/Iachines,

of which the following is a specification.

This invention relates to machines for perforating leather and other materials, and is particularly intended for making ornamental perforations in toe-caps and other parts of boots and shoes.

The invention has for its object to provide a simple and effective machine comprising a work-supporting bed and a punch which is movable toward and from the bed to perforate and withdraw from the work, and is also movable laterally to feed the work step by step, said machine comprising also a flexible non-metallic facing-strip for the bed, which isinterposed between the bed and the punch and constitutes the acting face of the bed, so that the punch may be given an eective work-punching movement withoutbein g subj ected to contact with a metallic bed-surface, the said facing-strip being moved or fed step by step with the work, so that a fresh part of the strip or a fresh acting,r surface is presented tothe punch at each descent of the latter.

The invention consists in the several improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents an end elevation of a perforating-machine embodying my invention. Fig. 2 represents a side elevation, parts of the machine being shown in section. Fig. 3 represents an elevation of the presser-foot and its operating mechanism, the presser-foot guide and the shaft of the operating mechanism being shown in section. Fig. 4 represents a top viewof portions of the machine. Fig. 5 represents a side view of the cam which depresses the punch. Figs. 6 and 7 represent enlarged sectional views of the punch and portions of the bed-facing strip and Work, showing different stages of the operation.

The same reference characters indicate the same parts in all the figures.

. The frame of myimproved perforating-machine in the embodiment here shown comprises a suitable base 1 and an arm 2 rising and return to its starting position.

from the base and extending overa portion of the same.

3 represents the work-supporting bed, which is preferably vertically adjustable by means of a screwthreaded shank or stem 4, affixed to the bed, and a nut 5, supported by a standard 6 on the base 1 and engaged with the threaded shank 4, said nut being provided with a handf Wheel 7.. The shank 4and bed 3 are prevented from rotating with the nut 5 by means of a stud or pin 8, inserted in the standard 6 and entering a longitudinal groove 9 inthe shank 4, so that rotation of the nut 5 raises or lowers the bed Without turning it.

10 represents a punch adapted to cut a hole of circular' or other shape in a piece of work 12 supported by the bed. The punch 10 is affixed to a vertical punch-bar 13, which is movable toward and from the bed to cause the punch to enter and recede from the work, and is also movable laterally in a horizontal direction to cause the punch to feed the work The punch is guided in its vertical movements by guides14 14, formed on a horizontally-movable slot 15, and is reciprocated vertically by the conjoint action of a cam 17, affixed to the operating-shaft 18,and a spring 19,interposed between one of the guides 14 and a stud or pin inserted in the punch-bar 13, the spring forcing the punch-bar upwardly against the perimeter of the cam. The slide 15 is reciprocated horizontally to cause the punch to feed the Work step by step when depressed and return to its starting position when raised by means of a cam 20 on the shaft 1S, a lever 21, fulcrumed at 22 and having at one end a trundle-roll 23, bearing against the cam 20, a link 24 connecting the other end of the lever 2l with the slide 15, and a spring 25, which acts expansively to hold the trundle-roll 23 yieldingly against the perimeter of the, cam 20. The rotation of the cam 2O oscillates the lever 21 horizontally and causes it to reciprocate the slide 15. The link 24 is loosely jointed or connected to the lever 21 and to the slide 15, so that said link can conform to the dierent positions of the lever 21. The

length of the reciprocating movements imparted to the slide 15 by the camy 20 and lever 21 may be adjusted by means of a stopscrew 26 inserted in the arm 2 and arranged to abut against one arm of the lever 21, theremovable in a guide 29 in the arm 2.

by limiting the approach of the trundle-roll 23 toward the perimeter of the cam 20.

27 represents a presser-foot which is adapted to hold the work upon the supporting-bed and is attached to a vertical presser-bar 28, Said presser is reciprocated by means of a cam 30 on the shaft 18, a lever 3l, fulcrumed 'at 32 and having a longer arm bearing on the perimeter ofthe cam, and a shorter arm 33,wl1ich supports a stud 34, afiixed to the presser-bar, and a spring 35, which holds the stud 34 yieldingly against the arm 33, thus holding the arm 31 yieldingly against the perimeter of the cam 30. The rotation of the cam 30 oscillates the lever and causes it tocoperate with the spring in alternately raising and depressing the presser-foot.

36 represents an elongated iiexible nonmetallic facing-strip which is interposed between the bed 3 and the punch and constitutes the acting face of the bed. Said strip, which is preferably made of paper, is of such thickness that the punch in making its ydownward movement can pass through the work and well into the strip 3 without coming in contact with the metallic body of the bed, so that the punch is caused to effectively cut its way through the work, the facingstrip,which is fed forward after each descent of the punch, as hereinafter described, constitu ting a continuously-renewed bed or bed-surface which presents a flat unindented face to the punch at each descent thereof. The thickness of the facing-strip36is also such that the punch, after having descended to the full extent provided, so that its cutting' edge has passed through the work and well into the strip, as shown in Fig. 6, may be slightly raised or retracted, as shown in Fig. 7, prior to receiving its work-feeding movement, so that the facing-strip is relieved from pressure against the body of the bed 3, and at the same time remains in engagement with the cutting edge of the punch, so that when the latter is moved horizontally in the direction indicated by the arrow in Fig. 7 it will feed the facing-strip positively, as well as the work, thus insuring a renewal of the acting face of the bed after eachdepression of the punch. Provision is made for giving the punch its extreme downward movement, (illustrated in Fig. 6,) and then slightly -retracting the same, as shown inli'g; 7-, before the punch is raised out of engagement with the facing-strip and the work, said provision in this embodiment of my invention being a protuberance 170 on the cam 17. The said protuberance is at the end of the portion 171 of the cam, which gives the punch its downward movement, and is followed by a dwell or concentric portion 172 on the cam, which is timed to hold the punch punch reaches the end of said movement, the portion 173 of the cam reaches the punchbar and permits the latter to be raised by the spring 19 until the concentric portion or dwell 174 reaches the punch-bar. While this portion of the cam is in contact with the punch-bar, the punch is being moved hori- Zontally in the opposite direction, and is thus returned to the starting position. Means are provided for guiding the strip in its movement over the bed, the strip-guide here shown being an inclined slot 37, extending from one end of the bed to the upper surface thereof, as shown in Figs. 1 and 2. The reserve portion of the strip'36 is preferably disposed in a roll, as shown in Fig. 1, said roll being mounted on a reel or spool 38, which is rotatable on a stud 39, affixed to an arm 40 on the bed-supporting standard G. It is obvious, however, that the reserve portion of the strip may be supported and presented to the bed 3 in any other suitable way.

I regard the provision of means whereby the punch, which is adapted, as described, to feed the work step by step, is positively engaged with the facing-strip 36 during the work-feeding movement, so that the facingstrip isV also positively fed and a fresh part of its surface is presented to the punch at each descent of the latter. The provision of means for relieving the facing-strip from pressure against the bed tending to obstruct its feeding movement is also important, since without this provision the facing-strip, if subjected during its feeding movement to the pressure to which it is subjected when the punch is in the position shown in Fig. 6, Would be seriously retarded by friction. It will be observed that when the punch is in the position shown in Fig. 6 it exerts downward pressure on both the work and the facing-strip, so that the facing-strip is pressed closely against the body of the bed 3. This pressure is relieved by the slight retraction of the punch to the position shown in Fig. 7.

The described movements of the presserfoot are timed so' that the foot is raised during the feeding movement and depressed at all other times.

41 represents a gage affixed to the bed 3 and arranged to bear against the edge of the work, said gage being preferably adjustable, so that the distance between the edge of the work and the `holes made by the punch may be varied.

It is obvious that the punch-bar instead of having a single punch may have a gang or group of punches.

I do not limit myself to the details of mechanism herein shown and described,as the same may be variously modified without departing from the spirit of my invention.

I claim- 1. A perforating machine comprising a work-supporting bed, a punch'movable longitudinally toward and from the bed and laterally over it, mechanism for reciprocating the punch both longitudinally and laterally IOO IOS

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to give the punch work-penetrating movements and step-by-step work-feeding movements, a iexiblebed-facing strip and means for guiding said strip between the bed and the punch, said strip forming the acting face of the bed, the work-penetratin g movement of the punch causing it to engage said facingstrip so that the work-feeding movements of the punch also feed the facing-strip step by step.

2. A perforating machine comprising a work-supporting bed, a punch reciprocated longitudinally toward and from the bed and laterally over it, a flexible bed-facing strip guided between the bed and punch, the punch in its cutting movement passing through the work, entering the strip, and in its feeding movement moving the work and strip simultaneously, and means for relieving the strip from binding-pressure during the feeding movement.

3. A perforating machine comprising a work-supporting bed, a punch movable longitudinally toward and from the bed and laterally over it, a flexible bed -facing strip, means for guiding said strip between the punch and bed, means for reciprocating the punch longitudinally, said means having provisions for forcing the punch through the work into the strip, and then slightly retracting the punch to relieve its pressure on the strip wit-hout disengaging it from the strip, and means for reciprocating the punch laterally, said means being organized to give the punch its work-feeding movement while it is in said slightly-retracted position, whereby the strip although relieved from binding-pressure is positively engaged and fed by the punch.

` 4. A perforating machine comprising a work-supporting bed, a punch movable longitudinally toward and from the bed and laterally over it, mechanism for reciprocating the punch both longitudinally and laterally to give the punch work-penetrating movements and step-by-step work-feeding movements, a reel mounted on the frame of the machine, a rolled flexible bed-facing strip mounted thereon, and means for guiding said strip from the reel between the bed and punch.

5. A perforatingmachine comprising a work-supporting bed having a strip-guide at one end, a punch movable longitudinally toward and from the bed and laterally over it, mechanism for reciprocating the punch both longitudinally and laterally to give the punch the described work penetrating and feeding movements, and an elongated flexible bedfacing strip engaged with said guide, the latter being arranged to direct said strip between the bed and punch.

6. A perforating -machine comprising a work-supporting bed having a strip-guide at one end, a punchmovable longitudinally toward and from the bed and laterally over it, mechanism for reciprocating the punch both longitudinally and laterally to give the punch the described work penetrating and feeding movements, an elongated iiexible bed-facing strip engaged with said guide, the latter being arranged to direct said strip between the bed and punch, and means adjacent to said guide for supporting the reserve portion of said strip.

7. Aperforating-machine comprisingahorizontal work-supporting bed, a vertical punchbar having a perforating-punch located over said bed, a slide movable horizontally over the head and having guides in which the punchbar is movable vertically, a flexible bed-facing strip, means for guiding said strip between the bed and the punch, means for recipro cating the punch vertically, said means having provisions for forcing the punch into the facing-strip and leaving it temporarily in engagement with the said strip, and means for reciprocating the slide horizontally to give the punch its work -feeding and return movements, the last-mentioned means having provisions for giving the punch its work-feeding movement while it is engaged with the facingstrip, whereby the strip is fed positively step by step with the work.

8. A performing-machine comprising ahorizontal work-su pportin g bed, a vertical punchbar having a perforating-punch located over said bed, a slide movable horizontally over the bed and having guides in which the punchbar is movable vertically, a flexible bed-facing strip, means for guiding said strip between the bed and the punch, means for reciprocating the punch vertically, said means having provisions for forcing the punch into the facing-strip and leaving it temporarily in engagement with the said strip, means for reciprocating the slide horizontally to give the punch its work-feeding and return movements, the strip being fed by the punch with the work, and means for varying the length of the horizontal movements of the punch to vary the feed of the work and strip.

In testimony whereof I have aflixed my signature in presence of two witnesses.

WILLIAM I-I. TREEN.

Witnesses:

M. B. MAY, A. D. HARRISON.

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